JPS56126308A - Elastic surface wave dispersion type delay line - Google Patents

Elastic surface wave dispersion type delay line

Info

Publication number
JPS56126308A
JPS56126308A JP2999580A JP2999580A JPS56126308A JP S56126308 A JPS56126308 A JP S56126308A JP 2999580 A JP2999580 A JP 2999580A JP 2999580 A JP2999580 A JP 2999580A JP S56126308 A JPS56126308 A JP S56126308A
Authority
JP
Japan
Prior art keywords
reflecting
surface wave
grids
elastic surface
delay line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2999580A
Other languages
Japanese (ja)
Inventor
Toshihiko Kitano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP2999580A priority Critical patent/JPS56126308A/en
Publication of JPS56126308A publication Critical patent/JPS56126308A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/30—Time-delay networks
    • H03H9/42—Time-delay networks using surface acoustic waves
    • H03H9/44—Frequency dependent delay lines, e.g. dispersive delay lines

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Abstract

PURPOSE:To decrease the number of reflecting grids, by setting the space between the reflecting grids at a specific value and thus lowering no frequency characteristics of the delay time. CONSTITUTION:A pair of reflectors consisting of the input and output converters 2 and 3 comprising the reed screen type electrodes plus the reflecting grids 4-13 are provided on a piezoelectric substrate 1. The grid space xi+1-xi between the i-th and i+1st reflecting grids counted from the input or output converter 2 or 3 is set to be n-fold (n: >=2 integer) of the length of the elastic surface wave reflected from the i-th reflecting grid. Thus the number of the reflecting grids that is expressed by an equation N=f0.DELTAT/2n+1 (f0: central frequency; DELTAT: delay dispersion) can be decreased down to 1/n compared with the conventional case of n=1.
JP2999580A 1980-03-10 1980-03-10 Elastic surface wave dispersion type delay line Pending JPS56126308A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2999580A JPS56126308A (en) 1980-03-10 1980-03-10 Elastic surface wave dispersion type delay line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2999580A JPS56126308A (en) 1980-03-10 1980-03-10 Elastic surface wave dispersion type delay line

Publications (1)

Publication Number Publication Date
JPS56126308A true JPS56126308A (en) 1981-10-03

Family

ID=12291511

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2999580A Pending JPS56126308A (en) 1980-03-10 1980-03-10 Elastic surface wave dispersion type delay line

Country Status (1)

Country Link
JP (1) JPS56126308A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5319743A (en) * 1976-08-06 1978-02-23 Nec Corp Elastic surface wave dispersion type delay line

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5319743A (en) * 1976-08-06 1978-02-23 Nec Corp Elastic surface wave dispersion type delay line

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